Portable electric heater



Oct. 8, 1929. L. A. PANKRATZ T AL PORTABLE ELECTRIC HEATER Filed July 9.1928 mm 3 2 7 i Patented Oct. 8, 1929 UNITED STATES PATENT OFFICE LEONA, PANKRATZ AND ALEXANDER C. PAHKRATZ, 013 WAUKESEA, WISGGTISIN, A8-SIGNOBS TO QUALITY ALUMINUM CASTING (.10., 0F WAUKESHA, WISCONSINPORTABLE ELECTRIC HEATER Application filed July 9, 1928. Serial No.291,391.

This invention relates to a heater. v

Objects of this invention are to provide a novel form of electric heaterfor a room or for a similar purpose, which is adapted to quickly heatthe air and to diffuse the heated air and cause an adequate circulationof air past the heater and into the room, so that a thorough mixing ofthe outgoing air with the air in the room is obtained, and the heat isthus uniformly distributed. Further objects are to provide a novel formof electric heater in which the heating unit is carried in the hollowcore of a metal member provided with fins extending laterally from andintegral with the hollow core, so that the heat is conducted outwardlyby the finsand portable electric the fins'thus present a large expanseof stir-- face to the air which is forced thereover by means of a fan.

Further objects are to provide a self-contained, unitary, portableelectric heater which may be constructed in a. simple manner with all ofthe parts enclosed, and so arranged that there is nodanger of injury toany one coming in contact with the portable unit.

Embodiments ofthe invention are shown in the accompanying drawings inwhich:

Figure 1 is a horizontal sectional view through'the device correspondingto a section on the line 11 of Figure 2;

Figure 2 is a side elevation with parts broken away; v Figure 3 is afront view of the device; Figure 4 is a vertical sectional view of amodified form.

Referring to the drawings, it will be seen that the device comprises acasing having an enlarged portion 1 and a more restricted portion 2. Theportion 1 may be cylindrical, if desired, and may converge to therectangular portion 2. The portion 1 houses an electric motor 3 providedwith a fan 4. Preferably, the back of the casing is provided with aplurality of apertures 5 through which air may enter. The motor issupported within.the casing in any suitable manner.

Within the rectangular portion 2, a series of guiding vanes or baffleplates 8 are positioned. These baflle plates divide the outgoing airinto a plurality of streams and are provided on one side with downturnedlips or ends 9, and on the other side with upturned lips or ends 10.These baliie plates are cast integrally with a central hollow core orbody portion 11 which is open from its top to bottom, to provid e anopening for the electric heating element 12.

The member forming the core 11 and the integral plates 8 is cast frommetal, preferably aluminum, to secure the maximum lightness for thestructure. These fins readily conduct the heat outwardly from thecentral core 11, which is heated by the electric heater, and thus thefins provide an extensive surface across which the air sweeps.

The air is caused to impinge upon the central core by means of fingers16 carried by the guiding plates 15. In other words, these guidingplates 15 mounted at o posite sides of'the device, as .shown in.Figural, are slotted, so that the fingers 16 are thus formed. 7

The air sweeps inwardly due to the action of the fan and follows alongthe paths indicated' by the arrows in Figure 1. The upturned anddownturned outer ends of the vanes or bafiies cause the air to impingeupon these portions and also cause a slight whirl ing motion of the airwhich aids in its diifusion throughout the air in the room The device issupported by means of strap iron legs 13 joined by the arched bracingmember 14, as shown in Figure 3. Preferably, a pair of upstanding arms18 are provided between which a handle 17' is positioned, so that thedevice may be freely carried from one. point to another.

In the modified form shown in Figure 4, substantially the same inventiveidea is disclosed. However, the casing 19 is a vertical casing withinwhich the electric motor 20 and fan 21 are positioned. However, the fanis positioned directly opposite an aperture 22 in the upper portion ofone of the side walls. The bottom of the casing 19 is open. Itissupported by means of legs 23, so that it is spaced from the floor andallows cold air to enter its lower portion and to be sucked upwardlyinto the'casing. This air passes between the vanes 24 which are integralwith the hollow central core 25, a heating unit 26 being ositioiiedwithin the core. The construction in this respect is similar to thatpreviously described.

It will be seen that a very simple type of apparatus has been ro'videdby this invention which will quicl ly heat and difiuse the air in a roomand whichis self-contained and substantially fool-proof.

' Although the invention has been described in considerable detail, suchdescription is intended as illustrative rather than limiting as theinvention may be variously embodied 5 and as the scope of such inventionis to be determined as claimed.

We claim:

1. A device of the class described, legs supporting said casing inspaced relation to a :0 floor, a pluralitv of metal bafie' platesarranged longitudinally of said casing, a central hollow core formedintegrally with said bafie plates for receiving a heating unit andguiding fingers for directing air towards said central core, saidguiding finger being positioned between successive bafie plates.

2. In a device of the class described, ineluding a casin a plurality ofbattle plates projecting longitudinally of said casing, and

so aving an. integral central hollow core for receiving a hollow corefor receiving a heating unit, the outer ends of said bafie plates beingextended in opposite directions upon opposite sides of the core;

' 3. A device of the class described, includ ing a casing, a pluralityof bafiie' plates projecting longitudinally of the casing, and having anintegral central core for receiving a heating unit, said bafiie platesbeing posi- 49 tiohed upon opposite sides of the core with the outerends of the baflle plates on one side of the core being downturned andthe baflle plates on the other side of the core being upturned.

In testimony that we claim the foregoing we have hereunto set our handsat Waukesha, in the county of Naukesha, and State of isconsin.

ALEXANDER c. PANKRATZ.

LEON A. PANKRATZ.

